Exercise: Access a DataFrame Row

Cesar Aguilar
The pandas DataFrame: Working With Data Efficiently Cesar Aguilar 08:00
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kin on April 20, 2026

return df.loc[row_label]
  • df[‘cities’] 是一列 Series（带行索引）
  • 取某一格用 df[‘cities’].loc[2]（示例得到’Prague’）
  • 与 df.loc[2, ‘cities’] 等价
  • 对照 cities[2] → ‘Prague’（默认索引的Series）

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